Question:
A car travelling with of its actual speed covers 42 km in 1 hr 40 min 48 sec. Find the actual speed of the car.
[A].
25 km/hr
30 km/hr
35 km/hr
A car travelling with of its actual speed covers 42 km in 1 hr 40 min 48 sec. Find the actual speed of the car.
[A].
| 17 | 6 | km/hr |
| 7 |
[B].
[C].
[D].
Answer: Option D
Explanation:
| Time taken = 1 hr 40 min 48 sec = 1 hr 40 | 4 | min = 1 | 51 | hrs = | 126 | hrs. |
| 5 | 75 | 75 |
Let the actual speed be x km/hr.
| Then, | 5 | x x | 126 | = 42 |
| 7 | 75 |
| x = | 42 x 7 x 75 | = 35 km/hr. | ||
| 5 x 126 |